package com.china.cibn.bangtvmobile.bangtv.module.video.media;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.text.Layout;
import android.text.StaticLayout;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.widget.TextView;

/**
 * Created by hcc on 16/9/14 21:37
 *
 */
@SuppressLint("DrawAllocation")
public class OutlineTextView extends TextView {

  private TextPaint mTextPaint;

  private TextPaint mTextPaintOutline;

  private String mText = "";

  private float mBorderSize;

  private int mBorderColor;

  private int mColor;

  private float mSpacingMult = 1.0f;

  private float mSpacingAdd = 0;

  private boolean mIncludePad = true;


  public OutlineTextView(Context context) {

    super(context);
    initPaint();
  }


  public OutlineTextView(Context context, AttributeSet attrs) {

    super(context, attrs);
    initPaint();
  }


  public OutlineTextView(Context context, AttributeSet attrs, int defStyle) {

    super(context, attrs, defStyle);
    initPaint();
  }


  private void initPaint() {

    mTextPaint = new TextPaint();
    mTextPaint.setAntiAlias(true);
    mTextPaint.setTextSize(getTextSize());
    mTextPaint.setColor(mColor);
    mTextPaint.setStyle(Paint.Style.FILL);
    mTextPaint.setTypeface(getTypeface());

    mTextPaintOutline = new TextPaint();
    mTextPaintOutline.setAntiAlias(true);
    mTextPaintOutline.setTextSize(getTextSize());
    mTextPaintOutline.setColor(mBorderColor);
    mTextPaintOutline.setStyle(Paint.Style.STROKE);
    mTextPaintOutline.setTypeface(getTypeface());
    mTextPaintOutline.setStrokeWidth(mBorderSize);
  }


  public void setText(String text) {

    super.setText(text);
    mText = text;
    requestLayout();
    invalidate();
  }


  public void setTextSize(float size) {

    super.setTextSize(size);
    requestLayout();
    invalidate();
    initPaint();
  }


  public void setTextColor(int color) {

    super.setTextColor(color);
    mColor = color;
    invalidate();
    initPaint();
  }


  public void setShadowLayer(float radius, float dx, float dy, int color) {

    super.setShadowLayer(radius, dx, dy, color);
    mBorderSize = radius;
    mBorderColor = color;
    requestLayout();
    invalidate();
    initPaint();
  }


  public void setTypeface(Typeface tf, int style) {

    super.setTypeface(tf, style);
    requestLayout();
    invalidate();
    initPaint();
  }


  public void setTypeface(Typeface tf) {

    super.setTypeface(tf);
    requestLayout();
    invalidate();
    initPaint();
  }


  @Override
  protected void onDraw(Canvas canvas) {

    Layout layout = new StaticLayout(getText(), mTextPaintOutline,
        getWidth(), Layout.Alignment.ALIGN_CENTER, mSpacingMult,
        mSpacingAdd, mIncludePad);
    layout.draw(canvas);
    layout = new StaticLayout(getText(), mTextPaint, getWidth(),
        Layout.Alignment.ALIGN_CENTER, mSpacingMult, mSpacingAdd,
        mIncludePad);
    layout.draw(canvas);
  }


  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    Layout layout = new StaticLayout(getText(), mTextPaintOutline,
        measureWidth(widthMeasureSpec), Layout.Alignment.ALIGN_CENTER,
        mSpacingMult, mSpacingAdd, mIncludePad);
    int ex = (int) (mBorderSize * 2 + 1);
    setMeasuredDimension(measureWidth(widthMeasureSpec) + ex,
        measureHeight(heightMeasureSpec) * layout.getLineCount() + ex);
  }


  private int measureWidth(int measureSpec) {

    int result = 0;
    int specMode = MeasureSpec.getMode(measureSpec);
    int specSize = MeasureSpec.getSize(measureSpec);

    if (specMode == MeasureSpec.EXACTLY) {
      result = specSize;
    } else {
      result = (int) mTextPaintOutline.measureText(mText)
          + getPaddingLeft() + getPaddingRight();
      if (specMode == MeasureSpec.AT_MOST) {
        result = Math.min(result, specSize);
      }
    }

    return result;
  }


  private int measureHeight(int measureSpec) {

    int result = 0;
    int specMode = MeasureSpec.getMode(measureSpec);
    int specSize = MeasureSpec.getSize(measureSpec);

    int mAscent = (int) mTextPaintOutline.ascent();
    if (specMode == MeasureSpec.EXACTLY) {
      result = specSize;
    } else {
      result = (int) (-mAscent + mTextPaintOutline.descent())
          + getPaddingTop() + getPaddingBottom();
      if (specMode == MeasureSpec.AT_MOST) {
        result = Math.min(result, specSize);
      }
    }
    return result;
  }
}